Erasure shield



ERASURE SHIELD Augr?, 1951 Filed Dec. 5l 1949 ATTORNEY Patented Aug. 7,1 9'51 UITEIS sT-Arss PATENT orifice ERASURE SHIELD Grace D. Preston,Washington, D. C., assignor to Paul S. Devine Application December 5,1949, Serial No. 131,192

1 Claim. 1

The invention relates to erasure shields particularly adapted forerasing carbon copy sheets in a typewriter, and has for its object toprovide a device of this kind wherein the shield is formed from aflexible paper folded to a shape whereby a trough is formed, V-shaped incross section when the shield is inserted between a carbon sheet and thesecond sheet to catch the erasure particles, preventing them fromaccumulating between the sheets and forming blind spots, etc., as thetyping continues, after an erasing operation.

A further object is to provide the lower part of the shield with alonger fold than the intermediate portion, thereby forming a thin edge,which edge can be forced between the sheets of paper in the typewriter,and the upper section moved upwardly to the desired line for erasing,thereby opening the trough. The lower lia-nge also forms means wherebythe shield can be longitudiu nally moved or slid between the sheets tothe desired position.

A further object is to provide an erasure shield of the trough typecomprising an apertured section, the apertures being adapted to registerwith an erasure point, a lower flanged guide and supported sectionadapted to be frictionally held between sheets, and an intermediatesection forming a V-shaped trough when the shield is in use; saidsections being foldable onto each other.

With the above and other objects in View the invention resides in thecombination and arrangement of parts as hereinafter set forth, shown inthe drawing, described and claimed, it being understood that changes inthe precise embodiment of the invention may be made within the scope ofwhat is claimed without departing from the spirit of the invention.

Figure 1 is a perspective View of the erasure shield.

Figure 2 is a perspective view of the erasure shield, showing the shieldin position between sheets of paper on a typewriter roller.

Figure 3 is a perspective view of the shield showing the shield in flatform.

Figure 4 is an end view of a typewriter roller with sheets extendingpartially around the roller and between the roller and pressure rollers,and the upper part of the shield moved to an erasing position.

Referring to the drawing, the numeral I designates a conventional formof typewriter roller, and 2 pressure rollers usually carried by a bottomguide shield 3, for guiding the paper around (Cl. 1Z0-41) the roller.Extending around the roller, for purposes of illustration, are sheets ofpaper p and carbon sheets c.. The erasure shield 4 comprises anapertured section 5, an intermediate section 6 and a lower section 1 ofgreater length than the section 6. It will be noted that these sections,when bent upon themselves at 8, assume the shield form shown in Figure1, and being formed from a stii and flexible paper, will assume thepositions and shapes shown in Figures 2 and 4. After an erasingoperation the shield is opened and the particles collected can be easilybrushed from the shield.

The section 'l is slightly longer than the section 6, therefore it willbe seen that when the operator grasps the trough edge 9, and forces thesection 'l downwardly between the sheets, a comparatively thin edge ispresented below the shield, as at l0, which thin edge will befrictionally gripped between the sheets, and the operator can then slidethe shield to the desired position and then move the apertured section5V upwardly to the erasure point until the proper aperture 5a registerswith the proposed erasure. During this operation the V-shaped troughwhich catches the erasure particles is opened, indicated at Il.Therefore there is no danger of the particles clinging to the adjacentcarbon sheets or between the sheets. After the erasing operation, theoperator grasps the shield 9 between the ngers, removes the shield andshakes the residue therefrom. The shield does not grip and compact theresidue, hence the residue to the surface of the paper from which theshield is made, hence will easily shake therefrom after the erasingoperation.

From the above it will be seen that an erasure shield is provided whichis simple in construction, and one wherein an anchoring flange isprovided at its lower end, which flange will guideJ the shield as it isslid to an erasing position. It will also be seen that the trough can beopened to the desired width upon a slight rotation of the roller.

The invention having been set forth what is claimed as new and usefulis:

An erasure shield formed from flexible material and comprising anapertured erasure section arching the r-oll in engagement with thepaper, the lower end of the erasure section terminating in an upwardlyopening and forwardly extending trough forming section, the upper end ofthe trough forming section terminating in a downwardly extendingsection, said downwardly extending section terminating below 'thel lowerend of the trough forming section and adapted to be gripped between thesheets of Number Paper' 1,544,06

GRACE D. PRESTON. 4

UNITED STATES PATENTS Name Date McNeal July 30, 1925 Lindsay Mar. 31,1936 FOREIGN PATENTS Country Date Switzerland u 1- Jan. 2, 1940

